A now retracted article by Wakefield and others claimed that autism is caused by
a. baby formula fortified with iron.
b. lead poisoning.
c. the MMR vaccine.
d. excessive infantile exposure to television and computer screens.
c
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Which reason correctly explains why older, nontraditional students attend college?
A. They seek greater economic opportunities that come with education. B. They want the social stimulation a college atmosphere brings. C. They have no other sources of intellectual stimulation. D. College is pursued because of therapeutic reasons.
Which of the following is an accurate statement about alcohol use?
A. The lifetime prevalence for alcoholism in the United States is about 30 percent. B. The average life span of an alcoholic is 12 years shorter than that of the average citizen. C. Although alcohol impairs motor behavior, it does not lower performance on complex cognitive tasks. D. Alcohol abuse is a "pure" disorder, with less than 5 percent of alcohol abusers having a coexisting mental disorder.
Gee and Leigh (2007) analyzed aggressive behavior in the National Hockey League (NHL). They concluded that players born in North America were more likely to resort to fighting to deal with their frustration because
a. hockey players generally have aggressive personalities. b. they were always punished severely when they acted aggressively. c. the sport of hockey makes people act aggressively. d. they had been exposed to models of aggression in hockey from a young age.
The proportion in the tail of a normal distribution can never be more than 0.50
Indicate whether the statement is true or false